Clock-escapement



(No Model.)

G. HOLES.

CLOCK ESUAPEMENT.

No. 577,753. Patented Feb. 23, 1897.

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UNITED STATES PATENT OFFICE.

CHARLES HOLES, OF RIDGIVAY, PENNSYLVANIA.

CLOCK-ESCAPEMENT.

SPECIFICATION forming part of Letters Patent No. 577,753, dated February23, 1897.

Application filed March 18, 1896. Serial No. 583,779. (No model.)

To all whom, it may concern.-

Be it known that I, CHARLES HOLES, a citizen of the United States,residing at Ridgway, in the county of Elk, State of Pennsylvania, haveinvented certain new and useful Improvements in Clock-Escapements, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

This invention relates to certain new and useful improvements in clocks;and it per tains more particularly to the escapement; and it has for itsobject, among others, to provide an improved form of escapement composedof few parts, but those positive and reliable in their action, capableof manufacture at small cost, and not liable to get out of order.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be particularly pointed out in theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which Figure l is an enlarged detail in elevationwith a portion broken away, showing the escapement, and the shafts shownin section; and Fig. 2 is a top plan.

Like letters of reference indicate like parts throughout both views.

Referring now to the details of the drawings by letter, A designates aframe; B, the hairspring; 0, the shaft; D, the balance-wheel thereon,and E the ratchet or escape wheel, mounted on the shaft F, and all ofwhich parts may be of any well-known or approved form of construction.Fast on the shaft 0 is a collar G, having a tooth or projection g, whichconstitutes the unlocking-point, while fast upon the same shaft is theimpulse-wheel H, having on its lower side anotch h, as seen in Fig. 1.

I I is a double detent lever, pivotally mounted on a shaft 0', the onepart being forked, as at 1 and embracing the shaft, as seen in Fig. 1,whereby adjustment can be had, when desired.

.I is a spring, held at one end to a fixed part of the frame in anysuitable manner, as, for instance, by having its end passed through anopening in the lug j and ad justably held therein by a wedge or key J,as seen in Fig. l, the other end of the spring bearing against a lug orprojection on the detent-lever near its pivot. This spring holds thedetent-lever in position, and the spring is preferably made fromordinary watch hair-spring material, the tension thereof being adjustedby taking up or letting out the spring, as occasion may require. The armor portion I of this double lever carries a lateral projection K, whichextends into the path thereof and is designed to engage the teeth of theescape-wheel E, as seen in Figs. 1 and 2.

L is the unlocking-lever, pivotally mounted on a suitable pivot Z on theportion 1 of the double lever, the said unlocking-lever being tapered atboth ends and thepivot L carrying a cam-shaped lug L, against which isengaged one end of the spring M, which, like the spring .I, is of watchhair-spring material, its other end being held in any suitable manner,as by being passed through a lug Z and held in position by a wedge orkey 1 the tension of the spring being adjusted by taking up or lettingout the same, as occasion may require.

N is a lug or pin projecting from the free end of the portion 1 of thedetent-lever, as shown, and forming a stop for the downward movement ofthe unlocking-lever.

O is a pin or projection mounted on any stationary part of the frame andserving to limit the up ward movement of the unlockinglever. The detentand unlocking lever should be suitably poised.

I11 practice the tendency of the spring H is to push the unlocking-leveragainst the stop of the pin N.

In operation, when the unlocking-point g comes back to pass thedetent-lever, the unlocking-lever L opens to let the unlockingpoint passand then closes through the action of its spring, and when theunlocking-point comes back it strikes against the unlockinglever andactuates the double detent-lever to move the projection K away from andunlock the escape-wheel E, and as the escape-wheel moves the tooththereof, which isin proximity to the impulse-roller, will strike againstthe notch of said roller, thereby giving the balance a push around thehair-spring B, swinging it back, and as this motion or movement isrepeated at each movement of the collar G and roller H the balance iscaused to oscillate.

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

It is evident that while the invention has hereinbefore been describedin connection with clocks it is applicable to all forms of clocks andalso to watches.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination with the balance-wheel and its shaft, of a collarfast upon said shaft and having a projection, an impulse-wheel fast uponsaid shaft and having a notch upon its under side, the escape-Wheelmounted to cooperate with the impulse-wheel, a double detent-leverjointed between its ends, an unlocking-lever pivotally mounted on oneportion of the double detent-lever, a spring connected with one part ofthe double lever, and its free end acting upon a lug pivotally mountedon the unlocking-lever; substantially as described.

2. The combination with the balance-wheel and its shaft, of a collarfast upon said shaft and having a projection, an impulse-wheel fast uponsaid shaft and having a notch upon its under side, the escape-wheelmounted to cooperate with the impulse-wheel, a double detent-leverjointed between its ends, an unlocking-lever pivotally mounted 011 oneportion of the double detent-lever, a spring 0011- nected with one partof the double lever, and its free end acting upon a lug pivotallymounted on the unlocking-lever, said lug being camshaped and theunlocking-lever being tapered toward each end; substantially asdescribed.

3. The combination with the balance-wheel and its shaft, of a collarfast upon said shaft and having a projection, an impulse-wheel fast uponsaid shaft and having a notch upon its under side, the escape-wheelmounted to cooperate with the impulse-wheel, a double detent-leverjointed between its ends, an unlocking-lever pivotally mounted on oneportion of the double detentlever, a spring connected with one part ofthe double lever, and its free end acting upon a lug pivotally mountedon the unlocking-lever, said lugbeing camshaped and the unlocking-leverbeing tapered toward each end, and a spring having its free end arrangedto act upon alug on the detentlever near its joint; substantially asdescribed.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES HOLES.

Witnesses:

WM. J. MAXWELL, J. O. LUTHER.

